package day1

import java.util

object Test1_helloword {
  def main(args: Array[String]): Unit = {
    println("hello word")
    // 这里的ArrayList跟java中的一样
    val arr = new util.ArrayList[String]()

    val i = "yusheng"
//     i = "shenghuo"
    var a = "yusheng"
     a = "shenghuo"
    println(a)
  }
}
